You have a McLeod behind a slant six?
There is a clutch write-up over on slantsix.org. I don't believe there is an off the shelf HD race style available and Barber is taking daily driver.
About 3 years ago I bought a 3 piece clutch kit listed on Rockauto for around $100. It's a 10" HD (think taxi). It does the job, easy on the leg.
It's about 3/4" larger than stock but is scalloped so had to buy special small head attaching bolts from Brewers. It fits the stock flywheel. I'm not convinced I'm getting enough disc departure and I would have no problem using a Luk or other stock size.
